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Ehrleite

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Ehrleite, etc.

Tip Top Mine, Fourmile, Custer District, Custer Co., South Dakota, USA
Ehrleite

Tip Top Mine, Fourmile, Custer District, Custer Co., South Dakota, USA
Ehrleite, etc.

Tip Top Mine, Fourmile, Custer District, Custer Co., South Dakota, USA
Ehrleite

Tip Top Mine, Fourmile, Custer District, Custer Co., South Dakota, USA
Ehrleite, etc.

Tip Top Mine, Fourmile, Custer District, Custer Co., South Dakota, USA
Ehrleite

Tip Top Mine, Fourmile, Custer District, Custer Co., South Dakota, USA
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About EhrleiteHide

Howard Ehrle
Formula:
Ca4Be3Zn2(PO4)6 · 9H2O
Colour:
Colorless, White
Lustre:
Vitreous
Hardness:
3½
Specific Gravity:
2.64
Crystal System:
Triclinic
Name:
Named by G.W. Robinson, J.D. Grice, and J. Van Velthuizen in honor of Howard Ehrle, mineral collector from Miles City, Montana, USA, who found the first specimens of the mineral.
This page provides mineralogical data about Ehrleite.


Classification of EhrleiteHide

IMA status:
Approved
Approval Year:
1983
First Published:
1985
Strunz 8th ed.:
7/C.03-20
Nickel-Strunz 10th (pending) ed.:
8.CA.10

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
A : With small and large/medium cations
Dana 7th ed.:
40.5.6.1
Dana 8th ed.:
40.5.6.1

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
5 : AXO4·xH2O
Hey's CIM Ref.:
19.6.9

19 : Phosphates
6 : Phosphates of Zn

Physical Properties of EhrleiteHide

Lustre:
Vitreous
Transparency:
Transparent
Colour:
Colorless, White
Streak:
White
Hardness:
3½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
Parting:
On (001)
Fracture:
Irregular/Uneven, Sub-Conchoidal
Density:
2.64 g/cm3 (Measured)    2.49 g/cm3 (Calculated)

Optical Data of EhrleiteHide

Type:
Biaxial (+)
RI values:
nα = 1.556 nβ = 1.560 nγ = 1.580
2V:
Measured: 62° , Calculated: 50°
Max Birefringence:
δ = 0.024
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
r > v strong

Chemical Properties of EhrleiteHide

Formula:
Ca4Be3Zn2(PO4)6 · 9H2O
IMA Formula:
Ca2ZnBe(PO4)2(PO3OH) · 4H2O
Elements listed:
Be, Ca, H, O, P, Zn - search for minerals with similar chemistry

Crystallography of EhrleiteHide

Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.13 Å, b = 7.43 Å, c = 12.479 Å
α = 94.31°, β = 102.07°, γ = 82.65°
Ratio:
a:b:c = 0.96 : 1 : 1.68
Unit Cell V:
639.35 ų
Z:
2
Morphology:
Tabular crystals. Forms {100}, {010} and {001}.
Twinning:
Contact twinning, by reflection on {001}.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
12.41 (7)
6.95 (5)
6.58 (3)
4.31 (4)
3.161 (10)
3.014 (3)
2.723 (6)
(

Type Occurrence of EhrleiteHide

Type Locality:
ⓘ Tip Top Mine (Tip Top pegmatite), Fourmile, Custer District, Custer Co., South Dakota, USA
General Appearance of Type Material:
Tabular crystals as individuals and randomly oriented in aggregates
Place of Conservation of Type Material:
Canadian Museum of Nature, Ottawa, Canada, 49289.
South Dakota School of Mines and Technology, Rapid City, South Dakota, 2958.
National Museum of Natural History, Washington, D.C., USA, 160381.
Geological Setting of Type Material:
Complex granite pegmatite
Reference:
Robinson, G.W., Grice, J.D., Van Velthuizen, J. (1985) Ehrleite, a new calcium beryllium zinc phosphate hydrate from the Tip Top Pegmatite, Custer, South Dakota. The Canadian Mineralogist: 23: 507-510.
Download:
http://rruff.info/rruff_1.0/uploads/CM23_507.pdf

Synonyms of EhrleiteHide

Other Language Names for EhrleiteHide

German:Ehrleit
Russian:Эрлеит
Spanish:Ehrleita

Common AssociatesHide

Associated Minerals Based on Photo Data:
Roscherite1 photo of Ehrleite associated with Roscherite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.CA.DavidlloyditeZn3(AsO4)2·4H2O Tric. 1 : P1
8.CA.ApexiteNaMg(PO4)·9H2OTric. 1 : P1
8.CA.05FransoletiteCa3Be2(PO4)2(HPO4)2 · 4H2OMon.
8.CA.05ParafransoletiteCa3Be2(PO4)2(HPO4)2 · 4H2OTric. 1 : P1
8.CA.15FaheyiteBe2Mn2+Fe3+2(PO4)4 · 6H2OTrig. 3 2 : P31 2 1
8.CA.20GainesiteNa(Na,K)(Be,Li)Zr2(PO4)4 · 1.5-2H2OTet. 4mm : I41md
8.CA.20MccrillisiteNaCs(Be,Li)Zr2(PO4)4 · 1-2H2OTet. 4/mmm (4/m 2/m 2/m) : I41/amd
8.CA.20SelwyniteNaK(Be,Al)Zr2(PO4)4 · 2H2OTet.
8.CA.25PahasapaiteLi8(Ca,Li,K)10.5Be24(PO4)24 · 38H2OIso. 2 3 : I2 3
8.CA.30HopeiteZn3(PO4)2 · 4H2OOrth. mmm (2/m 2/m 2/m) : Pnma
8.CA.30ArsenohopeiteZn3(AsO4)2 · 4H2OOrth. mmm (2/m 2/m 2/m) : Pnma
8.CA.35WarikahniteZn3(AsO4)2 · 2H2OTric.
8.CA.40PhosphophylliteZn2Fe(PO4)2 · 4H2OMon. 2/m : P21/b
8.CA.45ParascholziteCaZn2(PO4)2 · 2H2OMon.
8.CA.45ScholziteCaZn2(PO4)2 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbcm
8.CA.50KeyiteCu2+3Zn4Cd2(AsO4)6 · 2H2OMon. 2/m
8.CA.55PushcharovskiteK0.6Cu18(AsO4)(HAsO4)10(H2AsO4)4(OH)9.6·18.6H2OTric.
8.CA.60ProsperiteCa2Zn4(AsO4)4 · H2OMon.
8.CA.65GengenbachiteKFe3+3(HPO4)4(H2PO4)2 · 6H2OTrig. 3m : P3 1c
8.CA.70ParahopeiteZn3(PO4)2 · 4H2OTric. 1 : P1

Related Minerals - Dana Grouping (8th Ed.)Hide

40.5.6.2UM2005-02-AsO:AlHPScSiScAsO4 · 2H2O

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

19.6.1TarbuttiteZn2(PO4)(OH)Tric. 1 : P1
19.6.2SpenceriteZn4(PO4)2(OH)2 · 3H2OMon. 2/m : P2/b
19.6.3HopeiteZn3(PO4)2 · 4H2OOrth. mmm (2/m 2/m 2/m) : Pnma
19.6.4ParahopeiteZn3(PO4)2 · 4H2OTric. 1 : P1
19.6.5Veszelyite(Cu,Zn)2Zn(PO4)2 · 2H2OMon. 2/m : P21/b
19.6.6Kipushite(Cu,Zn)5Zn(PO4)2(OH)6 · H2OMon.
19.6.7ScholziteCaZn2(PO4)2 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pbcm
19.6.8ParascholziteCaZn2(PO4)2 · 2H2OMon.
19.6.10Faustite(Zn,Cu)Al6(PO4)4(OH)8 · 4H2OTric. 1 : P1
19.6.11Aheylite(Fe2+,Zn)Al6(PO4)4(OH)8 · 4H2OTric. 1 : P1
19.6.12JungiteCa2Zn4Fe3+8(PO4)9(OH)9 · 16H2OOrth.
19.6.13SchooneriteZnMn2+Fe2+2Fe3+(PO4)3(OH)2 · 9H2OOrth. mmm (2/m 2/m 2/m) : Pbam
19.6.14PhosphophylliteZn2Fe(PO4)2 · 4H2OMon. 2/m : P21/b

Fluorescence of EhrleiteHide

Other InformationHide

Notes:
Readily soluble in cold, 20% HCl
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for EhrleiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Robinson, G.W., Grice, J.D., Van Velthuizen, J. (1985) Ehrleite, a new calcium beryllium zinc phosphate hydrate from the Tip Top Pegmatite, Custer, South Dakota. The Canadian Mineralogist: 23: 507-510.
Hawthorne, F.C., Bladh, K.W., Burke, E.A.J., Ercit, S., Grew, E.S., Grice, J.D., Puziewicz, J., Roberts, A.C., Schedler, R.A., Shigley, J.E. (1986) New mineral names. American Mineralogist: 71: 1543-1548.
Hawthorne, F.C., Grice, J.D. (1987) The crystal structure of ehrleite, a tetrahedral sheet structure. The Canadian Mineralogist: 25: 767-774.
Jambor, J.L., Puziewicz, J. (1989) New mineral names. American Mineralogist: 74: 500-505.

Internet Links for EhrleiteHide

Localities for EhrleiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
USA (TL)
 
  • South Dakota
    • Custer Co.
      • Custer District
        • Fourmile
Rocks & Minerals: 60: 117.
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